CHILDREN at this year's Fun4Kids Festival are being transformed into knights and gladiators with the help and creative imagination of the world famous Boxwars.

Clad in cardboard, the Melbourne-based Boxwarriors do battle around the nation and often appear at major music festivals in their elaborate boxware creations.

This week at Fun4Kids Festival the crew is running a children's workshop, crafting swords, spears, battle axes, helmets and armour using just cardboard, box cutters and glue guns.

Boxwars founder, Supreme Overlord Ross Koger, said the group was enjoying its Warrnambool experience so far.

"It's been great and good fun," he said.

"It's a good experience to see a kid really excited to get their armour and sword.

"When we did one earlier in the year there was a good moment where the kids had all their armour on and the sun was setting, they were all playing on the lawn and it just looked awesome."

Mr Koger said Boxwars started with humble beginnings 11 years ago, as a group of friends messing around in their backyard, building armour and weapons from cardboard before holding events to destroy them.

"The children's workshop is just one aspect of what we do.

"Normally we get a big group together and do battles at music festivals and stuff like that.

"At the last festival, Boogie in Tallarook, we built a huge monster truck out of cardboard and the goal was to destroy it in front of a large crowd."